To maintain lasting energy and focus, prioritize sleep, hydration, and balanced nutrition. Aim for 7-9 hours of sleep per night, as it enhances cognitive function and mood. Stay hydrated throughout the day, as dehydration can impair focus and energy. Incorporate complex carbs, lean proteins, and healthy fats into meals for sustained energy levels. Regular physical activity boosts circulation and cognitive function, while managing stress through mindfulness or deep breathing improves concentration. Lastly, take short breaks throughout the day to recharge, as prolonged focus without rest can lead to burnout and reduced productivity.